// Copyright 2000-2018 JetBrains s.r.o.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package org.intellij.plugins.markdown.highlighting;

import com.intellij.lexer.Lexer;
import com.intellij.psi.impl.cache.impl.BaseFilterLexer;
import com.intellij.psi.impl.cache.impl.OccurrenceConsumer;
import com.intellij.psi.impl.cache.impl.todo.LexerBasedTodoIndexer;
import com.intellij.psi.search.UsageSearchContext;

public class MarkdownTodoIndexer extends LexerBasedTodoIndexer {
  @Override
  public Lexer createLexer(OccurrenceConsumer consumer) {
    return new BaseFilterLexer(new MarkdownHighlightingLexer(), consumer) {
      @Override
      public void advance() {
        if (MarkdownIndexPatternBuilder.COMMENT_TOKEN_SET.contains(myDelegate.getTokenType())) {
          scanWordsInToken(UsageSearchContext.IN_COMMENTS, false, false);
          advanceTodoItemCountsInToken();
        }

        myDelegate.advance();
      }
    };
  }
}